package 学生成绩管理系统;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.util.*;
class Student implements java.io.Serializable{
    String number,name,specialty,grade,borth,sex;
    public Student(){};
    public void setNumber(String number){ this.number=number;}
    public String getNumber(){ return number;}
    public void setName(String name){ this.name=name;}
    public String getName(){ return name;}
    public void setSex(String sex){ this.sex=sex;}
    public String getSex(){ return sex;}
    public void setSpecialty(String specialty){ this.specialty=specialty;}
    public String getSpecialty(){ return specialty;}
    public void setGrade(String grade){ this.grade=grade;}
    public String getGrade(){ return grade;}
    public void setBorth(String borth){ this.borth=borth;}
    public String getBorth(){ return borth;}
}
public class StudentManager extends JFrame{
    JLabel lb=new JLabel("录入请先输入记录，查询、删除请先输入学号，修改是对查询" +
            "内容改后的保存！");
    JTextField 学号,姓名,专业,年级,出生;
    JRadioButton 男,女;
    ButtonGroup group=null;
    JButton 录入,查询,删除,修改,显示;
    JPanel p1,p2,p3,p4,p5,p6,pv,ph;
    Student 学生=null;
    Hashtable 学生散列表=null;
    File file=null;
    FileInputStream inOne=null;
    ObjectInputStream inTwo=null;
    FileOutputStream outOne=null;
    ObjectOutputStream outTwo=null; 
    public StudentManager(){
      super("学生基本信息管理系统");
      学号=new JTextField(10);
      姓名=new JTextField(10);
      专业=new JTextField(10);
      年级=new JTextField(10);
      出生=new JTextField(10);
      group=new ButtonGroup();
      男=new JRadioButton("男",true);
      女=new JRadioButton("女",false);
      group.add(男);
      group.add(女);
      录入=new JButton("录入");
      查询=new JButton("查询");
      删除=new JButton("删除");
      修改=new JButton("修改");
      显示=new JButton("显示");
      录入.addActionListener(new InputAct());
      查询.addActionListener(new InquestAct());
      修改.addActionListener(new ModifyAct());
      删除.addActionListener(new DeleteAct());
      显示.addActionListener(new ShowAct());
      修改.setEnabled(false);
      p1=new JPanel();
      p1.add(new JLabel("学号:",JLabel.CENTER));
      p1.add(学号);
      p2=new JPanel();
      p2.add(new JLabel("姓名:",JLabel.CENTER));
      p2.add(姓名);
      p3=new JPanel();
      p3.add(new JLabel("性别:",JLabel.CENTER));
      p3.add(男);
      p3.add(女);
      p4=new JPanel();
      p4.add(new JLabel("专业:",JLabel.CENTER));
      p4.add(专业);
      p5=new JPanel();
      p5.add(new JLabel("年级:",JLabel.CENTER));
      p5.add(年级);
      p6=new JPanel();
      p6.add(new JLabel("出生:",JLabel.CENTER));
      p6.add(出生);
      pv=new JPanel();
      pv.setLayout(new GridLayout(6,1));
      pv.add(p1);
      pv.add(p2);
      pv.add(p3);
      pv.add(p4);
      pv.add(p5);
      pv.add(p6);
      ph=new JPanel();
      ph.add(录入);
      ph.add(查询);
      ph.add(修改);
      ph.add(删除);
      ph.add(显示);
      file=new File("学生信息.txt");
      学生散列表=new Hashtable();
        if(!file.exists()){
            try{
                FileOutputStream out=new FileOutputStream(file);
                ObjectOutputStream objectOut=new ObjectOutputStream(out);
                objectOut.writeObject(学生散列表);
                objectOut.close();
                out.close();
            }
            catch(IOException e){}
        }
        Container con=getContentPane();
        con.setLayout(new BorderLayout());
        con.add(lb, BorderLayout.NORTH);
        con.add(pv, BorderLayout.CENTER);
        con.add(ph, BorderLayout.SOUTH);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setBounds(100,100,600,300);
        setVisible(true);
    }
    public static void main(String[] args) {
        new StudentManager();
    }
    class InputAct implements ActionListener{
        public void actionPerformed(ActionEvent e){
           修改.setEnabled(false);
           String number="";
           number=学号.getText();
          if(number.length()>0){
              try{
                  inOne=new FileInputStream(file);
                  inTwo=new ObjectInputStream(inOne);
                  学生散列表=(Hashtable)inTwo.readObject();
                  inOne.close();
                  inTwo.close();
              }
              catch(Exception ee){System.out.println("创建散列表出现问题！");}
              if(学生散列表.containsKey(number)){
                  String warning="该生信息已存在，请到修改页面修改！";
                  JOptionPane.showMessageDialog(null,warning,"警告",
                          JOptionPane.WARNING_MESSAGE);
              }//end if1
              else{
                  String m="该生信息将被录入！";
                  int ok=JOptionPane.showConfirmDialog(null,m,"确认",
                          JOptionPane.YES_NO_OPTION,JOptionPane.INFORMATION_MESSAGE);
                  if(ok==JOptionPane.YES_OPTION){
                      String name=姓名.getText();
                      String specialty=专业.getText();
                      String grade=年级.getText();
                      String borth=出生.getText();
                      String sex=null;
                      if(男.isSelected()){sex=男.getText();}
                      else{sex=女.getText();}
                      学生=new Student();
                      学生.setNumber(number);
                      学生.setName(name);
                      学生.setSpecialty(specialty);
                      学生.setGrade(grade);
                      学生.setBorth(borth);
                      学生.setSex(sex);
                      try{
                          outOne=new FileOutputStream(file);
                          outTwo=new ObjectOutputStream(outOne);
                          学生散列表.put(number,学生);
                          outTwo.writeObject(学生散列表);
                          outTwo.close();
                          outOne.close();
                      }
                      catch(Exception ee){System.out.println("输出散列表出现问题！");}
                      学号.setText(null);
                      姓名.setText(null);
                      专业.setText(null);
                      年级.setText(null);
                      出生.setText(null);
                  }
              }//end else1
          }//end if0
          else{
              String warning="必须输入学号！";
              JOptionPane.showMessageDialog(null,warning,
                      "警告",JOptionPane.WARNING_MESSAGE);
          }//end else0
      }//end actionPerformed
  }//end class
    class InquestAct implements ActionListener{
        public void actionPerformed(ActionEvent e){
           String number="";
           number=学号.getText();
          if(number.length()>0){
              try{
                  inOne=new FileInputStream(file);
                  inTwo=new ObjectInputStream(inOne);
                  学生散列表=(Hashtable)inTwo.readObject();
                  inOne.close();
                  inTwo.close();
              }
              catch(Exception ee){System.out.println("散列表有问题！");}
              if(学生散列表.containsKey(number)){
                修改.setEnabled(true);
                Student stu=(Student)学生散列表.get(number);
                姓名.setText(stu.getName());
                专业.setText(stu.getSpecialty());
                年级.setText(stu.getGrade());
                出生.setText(stu.getBorth());
                if(stu.getSex().equals("男")){男.setSelected(true);}
                else{女.setSelected(true);}
              }
              else{
                  修改.setEnabled(false);
                  String warning="该学号不存在！";
              JOptionPane.showMessageDialog(null,warning,
                      "警告",JOptionPane.WARNING_MESSAGE);
              }
          }
          else{
          修改.setEnabled(false);
          String warning="必须输入学号！";
              JOptionPane.showMessageDialog(null,warning,
                      "警告",JOptionPane.WARNING_MESSAGE);
          }
        }
    }
     class ModifyAct implements ActionListener{
       public void actionPerformed(ActionEvent e){
           String number=学号.getText();
           String name=姓名.getText();
           String specialty=专业.getText();
           String grade=年级.getText();
           String borth=出生.getText();
           String sex=null;
           if(男.isSelected()){sex=男.getText();}
           else{sex=女.getText();}
           Student 学生=new Student();
           学生.setNumber(number);
           学生.setName(name);
           学生.setSpecialty(specialty);
           学生.setGrade(grade);
           学生.setBorth(borth);
           学生.setSex(sex);
           try{
               outOne=new FileOutputStream(file);
               outTwo=new ObjectOutputStream(outOne);
               学生散列表.put(number, 学生);
               outTwo.writeObject(学生散列表);
               outTwo.close();
               outOne.close();
               学号.setText(null);
               姓名.setText(null);
               专业.setText(null);
               年级.setText(null);
               出生.setText(null);
           }
           catch(Exception ee){
               System.out.println("录入修改出现异常!");
               修改.setEnabled(false);
           }
       }
   }
   class DeleteAct implements ActionListener{
       public void actionPerformed(ActionEvent e){
           修改.setEnabled(false);
           String number=学号.getText();
          if(number.length()>0){
              try{
                  inOne=new FileInputStream(file);
                  inTwo=new ObjectInputStream(inOne);
                  学生散列表=(Hashtable)inTwo.readObject();
                  inOne.close();
                  inTwo.close();
              }
              catch(Exception ee){}
              if(学生散列表.containsKey(number)){
                Student stu=(Student)学生散列表.get(number);
                姓名.setText(stu.getName());
                专业.setText(stu.getSpecialty());
                年级.setText(stu.getGrade());
                出生.setText(stu.getBorth());
                if(stu.getSex().equals("男")){男.setSelected(true);}
                else{女.setSelected(true);}
              }
              String m="确定要删除该学生的记录吗？";
              int ok=JOptionPane.showConfirmDialog(null,m,"确认",
                 JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE);
              if(ok==JOptionPane.YES_OPTION){
                  学生散列表.remove(number);
                  try{
                      outOne=new FileOutputStream(file);
                      outTwo=new ObjectOutputStream(outOne);
                      outTwo.writeObject(学生散列表);
                      outTwo.close();
                      outOne.close();
                      学号.setText(null);
                      姓名.setText(null);
                      专业.setText(null);
                      年级.setText(null);
                      出生.setText(null);
                  }
                  catch(Exception ee){System.out.println(ee);}
              }
              else if(ok==JOptionPane.NO_OPTION){
                  学号.setText(null);
                  姓名.setText(null);
                  专业.setText(null);
                  年级.setText(null);
                  出生.setText(null);
              }
              else{
                  String warning="该学号不存在！";
                  JOptionPane.showMessageDialog(null,warning,
                          "警告",JOptionPane.WARNING_MESSAGE);
              }
          }
          else{
               String warning="必须输入学号！";
               JOptionPane.showMessageDialog(null,warning,
                      "警告",JOptionPane.WARNING_MESSAGE);
          }
       }
   }
   class ShowAct implements ActionListener{
       public void actionPerformed(ActionEvent e){
           new StudentShow(file);
       }
   }
   class StudentShow extends JDialog{
       Hashtable 学生散列表= null;
       JTextArea 显示=null;
       FileInputStream inOne=null;
       ObjectInputStream inTwo=null;
       File file=null;
       public StudentShow(File file){
           super(new JFrame(),"显示对话框");
           this.file=file;
           显示=new JTextArea(16,30);
           try{
               inOne=new FileInputStream(file);
               inTwo=new ObjectInputStream(inOne);
               学生散列表=(Hashtable)inTwo.readObject();
               inOne.close();
               inTwo.close();
           }
           catch(Exception ee){}
           if(学生散列表.isEmpty())显示.append("目前还没有学生的信息记录！\n");
           else{
               显示.setText("学号 姓名 性别 专业 年级 出生\n");
               for(Enumeration enm=学生散列表.elements();enm.hasMoreElements();){
                   Student stu=(Student)enm.nextElement();
                   String sex="";
                   if(stu.getSex().equals("男"))sex="男";
                   else sex="女";
                   String str=stu.getNumber()+","+stu.getName()+","+sex+","
                           +stu.getSpecialty()+","+stu.getGrade()+","+stu.getBorth()+"\n";
                   显示.append(str);
               }
           }
           JScrollPane scroll=new JScrollPane(显示);
           Container con=getContentPane();
           con.add("Center",scroll);
           con.validate();
           setVisible(true);
           setBounds(200,200,400,300);
           addWindowListener(new WindowAdapter(){
               public void windowClosing(WindowEvent e){setVisible(false);}
           }
           );
       }
   }
}